The upper most section of green jumpers on the left of the board are all ground connections, as are pin 11 & 12 on the second rail of jumpers. What I don't yet see is the ground connection from that center tap. The upper most pin above the two yellow and red wires could be meant for that but I don't have anything connected. It looks like it was never used. Since this discussion went much further than I expected (thank you!) I'll remove this PSU assembly and snap better pics for you. Despite it being a seemingly fundamental and simple topic, I'm intrigued that it wasn't necessarily a quick and wholly straight forward answer. On a side note, I'm not sure there's room for two transformers. It's super tight there actually.
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Re: Crumart Trilogy replacement power transformer
2011-06-04 by Boddington